import re

response_url = " http://www.atmyd.com/ebs/shop/ypcx/ajaxList?page=1&sorttype=&rows=20&pagetype=&mcjx=&mcyb=&mcpp=&mccpfl=&ykc=0&ckqbpz=0&txt=%E8%8E%AB%E5%8C%B9%E7%BD%97%E6%98%9F%E8%BD%AF%E8%86%8F"
s = re.split("page=(\d+)", response_url)[1]
print(s)
